From dc1fbc43be19d69a39b3e5374b106d6b0474958f Mon Sep 17 00:00:00 2001
From: George Melikov <mail@gmelikov.ru>
Date: Thu, 26 Jan 2017 23:32:36 +0300
Subject: [PATCH] OpenZFS 7253 - ztest failure: dsl_destroy_head(name) == 0
 (0x10 == 0x0), file ../ztest.c, line 3235 (#5660)

Authored by: Chris Williamson <chris.williamson@delphix.com>
Reviewed by: - Matthew Ahrens <mahrens@delphix.com>
Reviewed by: - Paul Dagnelie <pcd@delphix.com>
Approved by: - Robert Mustacchi <rm@joyent.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Ported-by: George Melikov <mail@gmelikov.ru>

OpenZFS-issue: https://www.illumos.org/issues/7253
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/754998c
Closes #5660
---
 cmd/ztest/ztest.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/cmd/ztest/ztest.c b/cmd/ztest/ztest.c
index 8d5ee0bad..3b504e791 100644
--- a/cmd/ztest/ztest.c
+++ b/cmd/ztest/ztest.c
@@ -3499,9 +3499,12 @@ ztest_objset_destroy_cb(const char *name, void *arg)
 	 * Destroy the dataset.
 	 */
 	if (strchr(name, '@') != NULL) {
-		VERIFY0(dsl_destroy_snapshot(name, B_FALSE));
+		VERIFY0(dsl_destroy_snapshot(name, B_TRUE));
 	} else {
-		VERIFY0(dsl_destroy_head(name));
+		error = dsl_destroy_head(name);
+		/* There could be a hold on this dataset */
+		if (error != EBUSY)
+			ASSERT0(error);
 	}
 	return (0);
 }